Magento2 REST API don´t connect after activate Cloudfare

Hi Friends, I have a store on Amazon work perfect with MAGENTO2 REST API. After activate with CloudFare something happens because we can´t connect with MAGENTO2 REST API. In the response we receive javascripts and texts from Cloudfare and we don´t know how to fix. We´re desesperate. We need help.

My wild guess on this is Websockets. Do you have it enabled?